/**
 * The MIT License
 *
 * Copyright (c) 2010 Benjamin Klum
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package org.helgoboss.scala_joda_time_additions

import org.joda.time.{DateTime, Interval, Duration}

class TraversableInterval (i: Interval) {
    def every(duration: Duration) = new Iterable[DateTime] {
        def iterator = new Iterator[DateTime] {
            private var nextTime = i.getStart
            
            def hasNext = {
                nextTime != null && !(nextTime isAfter i.getEnd)
            }
            
            def next = nextTime match {
                case time if !(time isAfter i.getEnd) =>
                    val timeToReturn = nextTime
                    nextTime = time plus duration
                    timeToReturn
                    
                case _ =>
                    null
            }
        }
    }
}